My thinking: a STOCK SKI, as in no plate, grate, ect, probably doesn't need it. a grate is going to change the pressure and angle of load on the tunnel, and the added speed of a plate will make it that much worse.

I will say that if I had to do mine again, I would go with either the r&d unit or Jorge's(305coco) Laying the glass and resin, although not difficult, is a pain in the ass because of the confined space.

2 GPR'S, first one modified 03 reason for reinforcement noticed cracks starting to apear in tunnel used R&D Carbon Fiber piece never had a problem since.. second 06 GPR will be doing 305coco's reinforcement this ski is stock....